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Mostrando ítems 1-20 de 21
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A practical guide to estimating the light extinction coefficient with nonlinear models—a case study on maize
Lacasa, Josefina; Hefley, Trevor J.; Otegui, María Elena; Ciampitti, Ignacio A. (Springer Nature, 2021-06-12)The fraction of intercepted photosynthetically active radiation (fPARi) is typically described with a non-linear function of leaf area index (LAI) and k, the light extinction coefficient. The parameter k is used to make ... -
Ability of in situ canopy spectroscopy to differentiate genotype by environment interaction in wheat
Arias, Claudia; Montero Bulacio, Enrique; Rigalli, Nicolás; Romagnoli, Martín; Curin, Facundo; Gonzalez, Fernanda Gabriela; Otegui, María Elena; Portapila, Margarita (Taylor & Francis, 2021-03)In recent years, the application of remote sensing techniques is gaining a growing interest and importance in agriculture. Researchers often combine data from near-infrared and red spectral bands according to their specific ... -
Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops
Cagnola, Juan I.; Parco, Martín; Rotili, Diego Hernán; Ploschuk, Edmundo L.; Curin, Facundo; Amas, Juan Ignacio; Luque, Sergio F.; Maddonni, Gustavo Angel; Otegui, María Elena; Casal, Jorge José (Oxford University Press, 2021-03)Identifying the physiological traits indirectly selected during the search for high-yielding maize hybrids is useful for guiding further improvements. To investigate such traits, in this study we focused on the critical ... -
Breeding effects on canopy light attenuation in maize: a retrospective and prospective analysis
Lacasa, Josefina; Ciampitti, Ignacio A.; Amas, Juan Ignacio; Curín, Facundo; Luque, Sergio F.; Otegui, María Elena (Oxford University Press, 2022-03)The light attenuation process within a plant canopy defines energy capture and vertical distribution of light and nitrogen (N). The vertical light distribution can be quantitatively described with the extinction coefficient ... -
Classification of argentine maize landraces in heterotic groups
Delucchi, Carla; Eyherabide, Guillermo; Lorea, Roberto Daniel; Presello, Daniel Alberto; Otegui, María Elena; López, César G. (Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, 2012)The genetic diversity of maize (Zea mays L) is a valuable and strategic natural resource that plays a key role in the breeding progress. However, exploitation of genetic variability from landraces has not reached a significant ... -
Diallel analysis of kernel weight and grain-filling traits in maize grown under contrasting nitrogen supply
Hisse, Ignacio R.; D’Andrea, Karina Elizabeth; Otegui, María Elena (Wiley, 2023-02)Understanding the inheritance of maize (Zea mays L.) kernel weight (KW) under contrasting nitrogen (N) supply is crucial for obtaining high KW across diverse N conditions. This work evaluated broad-sense heritability (H2), ... -
Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
Rossini, María; Curin, Facundo; Otegui, María Elena (Elsevier, 2023-12)Context or problem: Kernel number per ear (KNE) is the main driver of improved grain yield per ear (GYE) in maize (Zea mays L.). Under non-limiting conditions, KNE responded to variations in ear developmental traits such ... -
Ecophysiological traits in maize hybrids and their parental inbred lines: Phenotyping of responses to contrasting nitrogen supply levels
D'Andrea, Karina Elizabeth; Otegui, María Elena; Cirilo, Alfredo Gabriel; Eyherabide, Guillermo (Elsevier, 2009-10)Maize (Zea mays L.) breeding based primarily on final grain yield has been successful in improving this trait since the introduction of hybrids. Contrarily, understanding of the variation in ecophysiological processes ... -
Expressing the sunflower transcription factor HaHB11 in maize improves waterlogging and defoliation tolerance
Raineri, Jesica; Caraballo, Luciano; Rigalli, Nicolás; Portapila, Margarita; Otegui, María Elena; Lía Chan, Raquel (Oxford University Press, 2022-05)The sunflower (Helianthus annuus) transcription factor HaHB11 (H. annuus Homeobox 11) belongs to the homeodomain-leucine zipper family and confers improved yield to maize (Zea mays) hybrids (HiII × B73) and lines. Here we ... -
Field-grown transgenic wheat expressing the sunflower gene HaHB4 significantly outyields the wild type
Gonzalez, Fernanda Gabriela; Capella, Matías; Ribichich, Karina Fabiana; Curín, Facundo; Giacomelli, Jorge Ignacio; Ayala, Francisco; Watson, Gerónimo; Otegui, María Elena; Lía Chan, Raquel (2019-02)HaHB4 is a sunflower transcription factor belonging to the homeodomain-leucine zipper I family whose ectopic expression in Arabidopsis triggers drought tolerance. The use of PCR to clone the HaHB4 coding sequence for wheat ... -
Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
Luque, Sergio F.; Cirilo, Alfredo Gabriel; Otegui, María Elena (Elsevier, 2006-02)Genetic gains in grain yield and related phenotypic attributes have been extensively documented in maize (Zea mays L.), but the effect of breeding on the physiological determinants of grain yield is yet poorly understood. ... -
Kernel weight in maize: genetic control of its physiological and compositional determinants in a dent × flint-caribbean RIL population
Mandolino, Cecilia Ines; D´Andrea, Karina Elizabeth; Piedra, Carlina V.; Alvarez Prado, Santiago; Olmos, Sofía Eugenia; Cirilo, Alfredo Gabriel; Otegui, María Elena (Maydica-ist Sper Cerealicoltur, 2016-12)The genetic control of maize kernel weight (KW) determination could be studied through its physiological and/ or compositional determinants. Our objective was to dissect the genetic control of maize KW by analyzing its ... -
Kernel weight responses to the photo-thermal environment in maize dent × flint and flint × flint hybrids
Hisse, Ignacio R.; D´Andrea, Karina Elizabeth; Otegui, María Elena (American Society of Agronomy, 2021-02)Maize (Zea mays, L.) grain yield is assumed to be source limited during the flowering period but sink limited during grain growth; however, environmental restrictions during active grain filling may strongly affect final ... -
Maize genetic progress in the central Pampas of Argentina: effects of contrasting sowing dates
Amas, Juan Ignacio; Fernandez, Javier A.; Curin, Facundo; Cirilo, Alfredo Gabriel; Ciampitti, Ignacio A.; Otegui, María Elena (Elsevier, 2022-05)Delayed sowing date of maize (Zea mays L.) has become a broadly adopted practice in the Pampas region of Argentina, because late-sown crops frequently experience a more favorable water balance around flowering and a reduction ... -
Maize Nitrogen Use Efficiency: QTL Mapping in a U.S. Dent x Argentine-Caribbean Flint RILs population
Mandolino, Cecilia Ines; D'Andrea, Karina Elizabeth; Olmos, Sofía Eugenia; Otegui, María Elena; Eyherabide, Guillermo (2018-04)This study was aimed to identify quantitative trait loci (QTL) for nitrogen use efficiency (NUE) and related traits in a maize population derived from a cross between two lines with different genetic background (B100 and ... -
On-farm soybean genetic progress and yield stability during the early 21st century: A case study of a commercial breeding program in Argentina and Brazil
Abdala, Lucas J.; Otegui, María Elena; Di Mauro, Guido (Elsevier, 2024-03)CONTEXT: Most studies assessing the genetic progress in soybean have traditionally focused on retrospectives approaches, where commercial genotypes released over an extended period are tested in a limited number of ... -
OSTRICH-CROPGRO multi-objective optimization methodology for calibration of the growing dynamics of a second-generation transgenic soybean tolerant to high temperatures and dry growing conditions
Montero Bulacio, Enrique; Romagnoli, Martín; Otegui, María Elena; Chan, Raquel L.; Portapila, Margarita (Elsevier, 2023-02)Current estimates show that the impact of climate change on agriculture will result in yield losses in major crops of 8–43%, mainly due to a combination of drought and heat. Second-generation transgenic crops are expected ... -
Phenotypic plasticity for biomass partitioning in maize : genotype effects across a range of environments
Galizia, Luciana Ayelen; Munaro, Eugenia M.; Cirilo, Alfredo Gabriel; Otegui, María Elena; D’Andrea, Karina E. (Elsevier, 2020-10)El rendimiento en grano de maíz está determinado por el genotipo (G), el ambiente (E) y los efectos de la interacción G × E que influyen en la expresión de los rasgos a lo largo del ciclo del cultivo. Líneas endocriadas e ... -
Source-sink relations and kernel weight in maize inbred lines and hybrids : responses to contrasting nitrogen supply levels
Hisse, Ignacio R.; D'Andrea, Karina Elizabeth; Otegui, María Elena (Elsevier, 2019-01)Maize (Zea mays, L.) kernel weight (KW) is regulated by the source-sink relationship at the early grain-filling period, when potential kernel size is defined, and at the effective grain-filling period, when final KW is ... -
Water and radiation use efficiencies in maize: breeding effects on single-cross Argentine hybrids released between 1980 and 2012
Curin, Facundo; Severini, Alan David; Gonzalez, Fernanda Gabriela; Otegui, María Elena (Elsevier, 2019-11)Water deficit has been signaled as an important determinant of grain yield (GY) gaps between potential and actual GYs. Breeding for improved water as well as solar radiation productivities is a sustainable means to reduce ...